National and international milk surveillance.
D000818:Animals; D002170:Canada; D002489:Central America; D005507:Food Contamination, Radioactive / Q000032:analysis*; D008892:Milk / Q000032:analysis*; D011834:Radiation Monitoring; D011868:Radioisotopes / Q000032:analysis; D013020:South America; D014481:United States
D011868:Radioisotopes